Here is how I see the fight going:
Kaido starts out in his full Zoan form and uses Boro Breath to hit Garou from afar. Garou tries to redirect it with Water Stream but he gets blasted. Garou evolves to withstand the heat. Kaido then starts uses Kaifu, but Garou dodges continuously, and gets close to swing Kaido around, taking advantage of the 1800x LS gap (similar to Eustass Kidd's Gibson Slam). Kaido turns into his Hybrid Mode and uses Thunder Bagua, and although Garou manages to dodge, it grazes him (similar to Luffy).This gives Garou an even further advantage, as this allows his evolution to kick in. Garou bridges the speed gap, and surpasses it, causing Garou to become well above Kaido in speed. Garou kicks up multiple rocks to jump in between then at high speeds as an attempt to blitz Kaido, but Kaido uses his Future Sight and catches Garou with
Ragnaraku. Kaido takes up his Kanabo to see that Garou is not there, but he is above him. Garou hits Kaido with a WCIF fist, sending body shredding shockwaves throughout his body.
After the fight goes on, Kaido gets drunk, and uses his different modes to confuse Garou. As Kaido's haki grows, so would Garou's AP and speed, until the fight reaches a point where Kaido is completely outmatches stat-wise. Kaido decides to use his Flame Dragon mode. Kaido attacks Garou, and Garou starts to melt and burn slowly. After Kaido launches Garou to the ground, he sees that Garou is still standing, as he's now adapted to the heat. Garou, using his speed, gets in Kaido's face and pummels him with MCGSF, finishing Kaido off.